X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstdio%2Frename.c;h=409005f933776055198186e34713cf6f1ab9bd3f;hp=d9b3d1ff2e200314c2f919673f7f89511e46b927;hb=55cf35957bf8dec0a489ba758c02c83303a5eb50;hpb=1d9d92ba957a0b8307c9a65c35867fde68e6533b

diff --git a/functions/stdio/rename.c b/functions/stdio/rename.c
index d9b3d1f..409005f 100644
--- a/functions/stdio/rename.c
+++ b/functions/stdio/rename.c
@@ -1,8 +1,85 @@
-/* ----------------------------------------------------------------------------
- * $Id$
- * ----------------------------------------------------------------------------
- * Public Domain C Library - http://pdclib.sourceforge.net
- * This code is Public Domain. Use, modify, and redistribute at will.
- * --------------------------------------------------------------------------*/
-
-int rename( const char * old, const char * new ) { /* TODO */ };
+/* $Id$ */
+
+/* rename( const char *, const char * )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <stdio.h>
+
+#ifndef REGTEST
+#include <_PDCLIB_glue.h>
+
+#include <string.h>
+
+extern struct _PDCLIB_file_t * _PDCLIB_filelist;
+
+int rename( const char * old, const char * new )
+{
+    struct _PDCLIB_file_t * current = _PDCLIB_filelist;
+    while ( current != NULL )
+    {
+        if ( ( current->filename != NULL ) && ( strcmp( current->filename, old ) == 0 ) )
+        {
+            /* File of that name currently open. Do not rename. */
+            return EOF;
+        }
+        current = current->next;
+    }
+    return _PDCLIB_rename( old, new );
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+#include <stdlib.h>
+
+int main( void )
+{
+    FILE * file;
+    remove( testfile1 );
+    remove( testfile2 );
+    /* make sure that neither file exists */
+    TESTCASE( fopen( testfile1, "r" ) == NULL );
+    TESTCASE( fopen( testfile2, "r" ) == NULL );
+    /* rename file 1 to file 2 - expected to fail */
+    TESTCASE( rename( testfile1, testfile2 ) == -1 );
+    /* create file 1 */
+    TESTCASE( ( file = fopen( testfile1, "w" ) ) != NULL );
+    TESTCASE( fputs( "x", file ) != EOF );
+    TESTCASE( fclose( file ) == 0 );
+    /* check that file 1 exists */
+    TESTCASE( ( file = fopen( testfile1, "r" ) ) != NULL );
+    TESTCASE( fclose( file ) == 0 );
+    /* rename file 1 to file 2 */
+    TESTCASE( rename( testfile1, testfile2 ) == 0 );
+    /* check that file 2 exists, file 1 does not */
+    TESTCASE( fopen( testfile1, "r" ) == NULL );
+    TESTCASE( ( file = fopen( testfile2, "r" ) ) != NULL );
+    TESTCASE( fclose( file ) == 0 );
+    /* create another file 1 */
+    TESTCASE( ( file = fopen( testfile1, "w" ) ) != NULL );
+    TESTCASE( fputs( "x", file ) != EOF );
+    TESTCASE( fclose( file ) == 0 );
+    /* check that file 1 exists */
+    TESTCASE( ( file = fopen( testfile1, "r" ) ) != NULL );
+    TESTCASE( fclose( file ) == 0 );
+    /* rename file 1 to file 2 - expected to fail, see comment in
+       _PDCLIB_rename() itself.
+    */
+    /* NOREG as glibc overwrites existing destination file. */
+    TESTCASE_NOREG( rename( testfile1, testfile2 ) == -1 );
+    /* remove both files */
+    remove( testfile1 );
+    remove( testfile2 );
+    /* check that they're gone */
+    TESTCASE( fopen( testfile1, "r" ) == NULL );
+    TESTCASE( fopen( testfile2, "r" ) == NULL );
+    return TEST_RESULTS;
+}
+
+#endif
+